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- Name : Gadolinium
- Symbol : Gd
- Atomic # : 64
- Atom weight: 157.25
- Melting P. : 1313
- Boiling P. : 3273
- Oxidation : +3
- Pronounced : GAD-eh-LIN-i-em
- From : Named after gadolinite, a mineral named for the Finnish
- Chemist, Johan Gadolin
- Identified : J. de Marignac (1880) and Lecoq de Boisbaudran (1886)
- Appearance : Soft, ductile, silvery-white metal
- Note : Used to alloy with other elements
-
- [Properties]
-
- Gadolinium is described as soft, ductile, silvery-white metal. It is
- relatively stable in air, but tarnishes in moist air to produce a white
- oxide that eventually flakes off to expose more metal. Gadolinium in in
- the middle of the lanthanide series of elements (atomic numbers 57 through
- 71).
- There are two different crystalline, allotropic forms. The alpha form
- is the one that exists at room temperature. The beta form takes place at
- temperatures above 1235 degrees.
- Gadolinium has the capacity for absorbing larger concentrations of
- thermal neutrons than any other naturally occurring element. That makes
- it an ideal material for control rods in nuclear power generators.
-